Adjustable arch-span and beam form.



H. E. SMITH.

' ADJUSTABLE ARCH SPAN AND BEAM FORM.

APPLICATION FILED OCT. 9. F916.

1 QWA? 1 n Patented May 28, 1918.

INVENTOR. Harg/ E. 507/17 ATTORNEY5.

WITNESSES.-

onrrnn sra'rns earner orrrca '1 HARRY E. SMITH, OF INDIANAPOLIS, INDIANA.

ADJUSTABLE ARCH-SPAN AND BEAM FORM.

Application filed October 9, 1916.

To all whom it may concern:

Be it known that I, ITARRY E. SMITH, acitizen of the United States, and a resident of Indianapolis, county of Marion. and I State of Indiana, have invented a certain new and useful Adjustable Arch-Span and 30am Form; and I do hereby declare that the following is a full, clean-and exact description thereof. reference being had. to the accompanying drawings. in which like letters refer to like parts.

This invention relates to an improved means for forming concrete floors supported by concrete beams and arches in such a way that the forms used may be adjusted to any depth or width of beam or span the form being so constructed as to provide an arch which will strengthen the floor.

The main feature of the invention resides in adjustable brackets secured to the wall of the form for supporting the beam support, whereby said beam support may be set at any desired depth.

Another feature of the invention consists of the arch support and the manner in which it is secured in place so that supports of various lengths may be easily substituted for each other for varying the width of the arch.

The full nature of the invention will be understood from the accompanying drawings and the following description and claims.

In the drawings, Figure 1 is a perspective view of the form showing a portion of a concrete floor. Fig. 2 is a vertical cross section through the form showing a beam of shallow depth. Fig. 3 is the same as Fig. 2 showing the form for providing a beam of greater depth. Fig. 4 is a perspective view of an adjusting bracket.

In the drawings there is shown a form for concrete floors having side walls 10 and brackets 11 secured to the inner and upper portions thereof and extending in 'ardly to support an arch beam 12 on which rests an arch support 13. The arch support 13 is preferably formed of two pieces. and the beams 12 are preferably substantially pyramidal in outline so as to dispose the sections of the arch supports 13 in opposed inclined planes, and as the beams 12 and sectional support 13 are separate from the side walls 10, the arch produced may be varied in width by employing beams of varying Specification of Letters Patent.

Patented Ma as, 1918.

Serial No. 124,703.

sion of the parts 12 and 13 should reach such a degree a to cause a crack in the flooring the severance will occur immediately over the apex over the arch support 13 which will not affect the strength of the arch in any manner. The walls 10 are provided with holes 14 at varying heights through which bolts are adapted to extend to engage the brackets 15 which extend in wardly and are provided with slots 16. The bolts 17 have thumb nuts for tightening them in place when the angle irons are properly adjusted to the depth of beam desired; Supported on the inwardly extending flanges of said brackets there are beam supports 18 which are secured thereto by nails or any other suitable means. This forms the bottom portion of the beam and its adj ustability with reference to the side walls permits the forming of a beam of any depth. By extending a bolt 17 through each side wall 10 and through the longitudinal slot 16 in the bracket 15, the angular portion of the bracket may be disposed below the longitudinal axis of the bolt, and the bracket adjusted upwardly and downwardly the full length of the slot therein for regulating the depth of the beam, and in addition to this adjustment the angular portion of the bracket 15 may be positioned above the longitudinal axis of the bolt and a greater degree of adjustment, for shortening the depth of the beam, obtained. There are battens 20 secured to the walls 10 for preventing their warping, and a spreader 21 is wedged in between said walls for preventing their collapse when the concrete flooring 22 is poured into the form. The form 23 for a girder may be constructed in any suitable manner. the construction herein shown being no part of this invention. v

After the concrete is set, the spreader 21 and the battens 20 may be knocked out and the side walls, spans, arches and supports removed.

including side walls, an arch support adapted to be removably supported thereby, said support being formed in two sections, said sections being oppositely inclined, substan- 'tially pyramidal supporting beams for said arch support having their ends resting on said side walls, brackets adjustably reversibly secured to the outer sides of said walls, and beam supports adjustably supported by said brackets, whereby they may be raised or lowered to form any desired depth of beam.

2. An adjustable arch span and beam form including side Walls, an arch support adapted to be removably supported thereby, said support being formed in two sections, said sect-ions being oppositely inclined, substantially pyramidal supporting beams for said vertically extending portions of said brackets having elongated slots, a single bolt for each bracket, said bolt extending through the side wall and slot of the bracket whereby the bracket may be adjusted vertically or rotated on the bolt to reverse the position of the horizontal portion thereof, wing nuts adapted to screw onto said bolts for securing them in their adjusted positions, and beam supports adjustably supported by said brackets, whereby they may be raised or lowered to form any de'sired depth of beam. In witness whereof, I have hereunto aflixed' my signature.

- HARRY E. SMITH.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

